Hi all.
Having just changed my CO2 bottle, I always have to tweak my needle valve when I fit a new bottle.
Tonight I observed something weird.
During the last hour of the lighting period, (CO2 had been off for an hour at this stage), all my Rummynose tetras went to the bottom near the substrate and were not swimming around and looking stressed. IME this tells me that I've cranked the CO2 too high .
However, tonight is the first time I've noticed this, when the lights went out, the Rummynose started swimming around as if nothing was wrong :?.
How mad is that? The CO2 doesn't just disappear when you turn the lights off :?.
Anyone have an explanation for this behaviour?
Having just changed my CO2 bottle, I always have to tweak my needle valve when I fit a new bottle.
Tonight I observed something weird.
During the last hour of the lighting period, (CO2 had been off for an hour at this stage), all my Rummynose tetras went to the bottom near the substrate and were not swimming around and looking stressed. IME this tells me that I've cranked the CO2 too high .
However, tonight is the first time I've noticed this, when the lights went out, the Rummynose started swimming around as if nothing was wrong :?.
How mad is that? The CO2 doesn't just disappear when you turn the lights off :?.
Anyone have an explanation for this behaviour?